Why is fission not an important energy source in the sun?

Explanation:

Nuclear Fission -

The process of the splitting of atom , by radioactive decay process or by any collisional impact .

Sun contains many radioactive isotopes like , thorium , uranium , etc .

The nuclear fission process is an intrinsic property of the radioactive nuclides.

Nuclear Fusion -

The process , where two or more than two atomic nuclei combines to form one or more different atomic nuclei and subatomic particles .

The energy released in both the process is almost same ,

But on the surface of Sun , hydrogen is abundantly present , hence , hydrogen fusion is possible , so the dominant source of energy on the sun is Fusion .

true tan speed = ang vel x radius

see earlier